Cullen/Frost ( CFR) shares were falling 1.3% to $54.55 despite Moody's Investors Services upgrading its outlook on the Texas bank to stable from negative. Moody's said in a report that Cullen/Frost's "strong asset quality results from the company's solid underwriting as well as the bank's portfolio being located in Texas, where the real estate market has performed better relative to other states."

Outperformers of the day included tax service providers. H&R Block ( HRB) shares and Jackson Hewitt ( JTX) shares were rising 2.1% and 1%, respectively.